flopy_swi2_ex4.py

import os
import platform
import sys

import numpy as np

import flopy

import matplotlib.pyplot as plt

# --modify default matplotlib settings
updates = {
    "font.family": ["Univers 57 Condensed", "Arial"],
    "mathtext.default": "regular",
    "pdf.compression": 0,
    "pdf.fonttype": 42,
    "legend.fontsize": 7,
    "axes.labelsize": 8,
    "xtick.labelsize": 7,
    "ytick.labelsize": 7,
}
plt.rcParams.update(updates)


def LegBar(ax, x0, y0, t0, dx, dy, dt, cc):
    for c in cc:
        ax.plot([x0, x0 + dx], [y0, y0], color=c, linewidth=4)
        ctxt = f"{t0:=3d} years"
        ax.text(x0 + 2.0 * dx, y0 + dy / 2.0, ctxt, size=5)
        y0 += dy
        t0 += dt
    return


def run():
    workspace = "swiex4"

    cleanFiles = False
    skipRuns = False
    fext = "png"
    narg = len(sys.argv)
    iarg = 0
    if narg > 1:
        while iarg < narg - 1:
            iarg += 1
            basearg = sys.argv[iarg].lower()
            if basearg == "--clean":
                cleanFiles = True
            elif basearg == "--skipruns":
                skipRuns = True
            elif basearg == "--pdf":
                fext = "pdf"

    if cleanFiles:
        print("cleaning all files")
        print("excluding *.py files")
        files = os.listdir(workspace)
        for f in files:
            fpth = os.path.join(workspace, f)
            if os.path.isdir(fpth):
                continue
            if ".py" != os.path.splitext(f)[1].lower():
                print(f"  removing...{os.path.basename(f)}")
                try:
                    os.remove(fpth)
                except:
                    pass
        return 0

    # Set path and name of MODFLOW exe
    exe_name = "mf2005"
    if platform.system() == "Windows":
        exe_name = "mf2005"

    ncol = 61
    nrow = 61
    nlay = 2

    nper = 3
    perlen = [365.25 * 200.0, 365.25 * 12.0, 365.25 * 18.0]
    nstp = [1000, 120, 180]
    save_head = [200, 60, 60]
    steady = True

    # dis data
    delr, delc = 50.0, 50.0
    botm = np.array([-10.0, -30.0, -50.0])

    # oc data
    ocspd = {}
    ocspd[(0, 199)] = ["save head"]
    ocspd[(0, 200)] = []
    ocspd[(0, 399)] = ["save head"]
    ocspd[(0, 400)] = []
    ocspd[(0, 599)] = ["save head"]
    ocspd[(0, 600)] = []
    ocspd[(0, 799)] = ["save head"]
    ocspd[(0, 800)] = []
    ocspd[(0, 999)] = ["save head"]
    ocspd[(1, 0)] = []
    ocspd[(1, 59)] = ["save head"]
    ocspd[(1, 60)] = []
    ocspd[(1, 119)] = ["save head"]
    ocspd[(2, 0)] = []
    ocspd[(2, 59)] = ["save head"]
    ocspd[(2, 60)] = []
    ocspd[(2, 119)] = ["save head"]

    modelname = "swiex4_2d_2layer"

    # bas data
    # ibound - active except for the corners
    ibound = np.ones((nlay, nrow, ncol), dtype=int)
    ibound[:, 0, 0] = 0
    ibound[:, 0, -1] = 0
    ibound[:, -1, 0] = 0
    ibound[:, -1, -1] = 0
    # initial head data
    ihead = np.zeros((nlay, nrow, ncol), dtype=float)

    # lpf data
    laytyp = 0
    hk = 10.0
    vka = 0.2

    # boundary condition data
    # ghb data
    colcell, rowcell = np.meshgrid(np.arange(0, ncol), np.arange(0, nrow))
    index = np.zeros((nrow, ncol), dtype=int)
    index[:, :10] = 1
    index[:, -10:] = 1
    index[:10, :] = 1
    index[-10:, :] = 1
    nghb = np.sum(index)
    lrchc = np.zeros((nghb, 5))
    lrchc[:, 0] = 0
    lrchc[:, 1] = rowcell[index == 1]
    lrchc[:, 2] = colcell[index == 1]
    lrchc[:, 3] = 0.0
    lrchc[:, 4] = 50.0 * 50.0 / 40.0
    # create ghb dictionary
    ghb_data = {0: lrchc}

    # recharge data
    rch = np.zeros((nrow, ncol), dtype=float)
    rch[index == 0] = 0.0004
    # create recharge dictionary
    rch_data = {0: rch}

    # well data
    nwells = 2
    lrcq = np.zeros((nwells, 4))
    lrcq[0, :] = np.array((0, 30, 35, 0))
    lrcq[1, :] = np.array([1, 30, 35, 0])
    lrcqw = lrcq.copy()
    lrcqw[0, 3] = -250
    lrcqsw = lrcq.copy()
    lrcqsw[0, 3] = -250.0
    lrcqsw[1, 3] = -25.0
    # create well dictionary
    base_well_data = {0: lrcq, 1: lrcqw}
    swwells_well_data = {0: lrcq, 1: lrcqw, 2: lrcqsw}

    # swi2 data
    adaptive = False
    nadptmx = 10
    nadptmn = 1
    nu = [0, 0.025]
    numult = 5.0
    toeslope = nu[1] / numult  # 0.005
    tipslope = nu[1] / numult  # 0.005
    z1 = -10.0 * np.ones((nrow, ncol))
    z1[index == 0] = -11.0
    z = np.array([[z1, z1]])
    iso = np.zeros((nlay, nrow, ncol), int)
    iso[0, :, :][index == 0] = 1
    iso[0, :, :][index == 1] = -2
    iso[1, 30, 35] = 2
    ssz = 0.2
    # swi2 observations
    obsnam = ["layer1_", "layer2_"]
    obslrc = [[0, 30, 35], [1, 30, 35]]
    nobs = len(obsnam)
    iswiobs = 1051

    modelname = "swiex4_s1"
    if not skipRuns:
        ml = flopy.modflow.Modflow(
            modelname, version="mf2005", exe_name=exe_name, model_ws=workspace
        )

        discret = flopy.modflow.ModflowDis(
            ml,
            nlay=nlay,
            nrow=nrow,
            ncol=ncol,
            laycbd=0,
            delr=delr,
            delc=delc,
            top=botm[0],
            botm=botm[1:],
            nper=nper,
            perlen=perlen,
            nstp=nstp,
            steady=steady,
        )
        bas = flopy.modflow.ModflowBas(ml, ibound=ibound, strt=ihead)
        lpf = flopy.modflow.ModflowLpf(ml, laytyp=laytyp, hk=hk, vka=vka)
        wel = flopy.modflow.ModflowWel(ml, stress_period_data=base_well_data)
        ghb = flopy.modflow.ModflowGhb(ml, stress_period_data=ghb_data)
        rch = flopy.modflow.ModflowRch(ml, rech=rch_data)
        swi = flopy.modflow.ModflowSwi2(
            ml,
            iswizt=55,
            nsrf=1,
            istrat=1,
            toeslope=toeslope,
            tipslope=tipslope,
            nu=nu,
            zeta=z,
            ssz=ssz,
            isource=iso,
            nsolver=1,
            nadptmx=nadptmx,
            nadptmn=nadptmn,
            nobs=nobs,
            iswiobs=iswiobs,
            obsnam=obsnam,
            obslrc=obslrc,
        )
        oc = flopy.modflow.ModflowOc(ml, stress_period_data=ocspd)
        pcg = flopy.modflow.ModflowPcg(
            ml, hclose=1.0e-6, rclose=3.0e-3, mxiter=100, iter1=50
        )
        # create model files
        ml.write_input()
        # run the model
        m = ml.run_model(silent=False)

    # model with saltwater wells
    modelname2 = "swiex4_s2"
    if not skipRuns:
        ml2 = flopy.modflow.Modflow(
            modelname2, version="mf2005", exe_name=exe_name, model_ws=workspace
        )

        discret = flopy.modflow.ModflowDis(
            ml2,
            nlay=nlay,
            nrow=nrow,
            ncol=ncol,
            laycbd=0,
            delr=delr,
            delc=delc,
            top=botm[0],
            botm=botm[1:],
            nper=nper,
            perlen=perlen,
            nstp=nstp,
            steady=steady,
        )
        bas = flopy.modflow.ModflowBas(ml2, ibound=ibound, strt=ihead)
        lpf = flopy.modflow.ModflowLpf(ml2, laytyp=laytyp, hk=hk, vka=vka)
        wel = flopy.modflow.ModflowWel(
            ml2, stress_period_data=swwells_well_data
        )
        ghb = flopy.modflow.ModflowGhb(ml2, stress_period_data=ghb_data)
        rch = flopy.modflow.ModflowRch(ml2, rech=rch_data)
        swi = flopy.modflow.ModflowSwi2(
            ml2,
            iswizt=55,
            nsrf=1,
            istrat=1,
            toeslope=toeslope,
            tipslope=tipslope,
            nu=nu,
            zeta=z,
            ssz=ssz,
            isource=iso,
            nsolver=1,
            nadptmx=nadptmx,
            nadptmn=nadptmn,
            nobs=nobs,
            iswiobs=iswiobs,
            obsnam=obsnam,
            obslrc=obslrc,
        )
        oc = flopy.modflow.ModflowOc(ml2, stress_period_data=ocspd)
        pcg = flopy.modflow.ModflowPcg(
            ml2, hclose=1.0e-6, rclose=3.0e-3, mxiter=100, iter1=50
        )
        # create model files
        ml2.write_input()
        # run the model
        m = ml2.run_model(silent=False)

    # Load the simulation 1 `ZETA` data and `ZETA` observations.
    # read base model zeta
    zfile = flopy.utils.CellBudgetFile(
        os.path.join(workspace, f"{modelname}.zta")
    )
    kstpkper = zfile.get_kstpkper()
    zeta = []
    for kk in kstpkper:
        zeta.append(zfile.get_data(kstpkper=kk, text="ZETASRF  1")[0])
    zeta = np.array(zeta)
    # read swi obs
    zobs = np.genfromtxt(
        os.path.join(workspace, f"{modelname}.zobs.out"), names=True
    )

    # Load the simulation 2 `ZETA` data and `ZETA` observations.
    # read saltwater well model zeta
    zfile2 = flopy.utils.CellBudgetFile(
        os.path.join(workspace, f"{modelname2}.zta")
    )
    kstpkper = zfile2.get_kstpkper()
    zeta2 = []
    for kk in kstpkper:
        zeta2.append(zfile2.get_data(kstpkper=kk, text="ZETASRF  1")[0])
    zeta2 = np.array(zeta2)
    # read swi obs
    zobs2 = np.genfromtxt(
        os.path.join(workspace, f"{modelname2}.zobs.out"), names=True
    )

    # Create arrays for the x-coordinates and the output years

    x = np.linspace(-1500, 1500, 61)
    xcell = np.linspace(-1500, 1500, 61) + delr / 2.0
    xedge = np.linspace(-1525, 1525, 62)
    years = [40, 80, 120, 160, 200, 6, 12, 18, 24, 30]

    # Define figure dimensions and colors used for plotting `ZETA` surfaces

    # figure dimensions
    fwid, fhgt = 8.00, 5.50
    flft, frgt, fbot, ftop = 0.125, 0.95, 0.125, 0.925

    # line color definition
    icolor = 5
    colormap = plt.cm.jet  # winter
    cc = []
    cr = np.linspace(0.9, 0.0, icolor)
    for idx in cr:
        cc.append(colormap(idx))

    # Recreate **Figure 9** from the SWI2 documentation (http://pubs.usgs.gov/tm/6a46/).

    plt.rcParams.update({"legend.fontsize": 6, "legend.frameon": False})
    fig = plt.figure(figsize=(fwid, fhgt), facecolor="w")
    fig.subplots_adjust(
        wspace=0.25, hspace=0.25, left=flft, right=frgt, bottom=fbot, top=ftop
    )
    # first plot
    ax = fig.add_subplot(2, 2, 1)
    # axes limits
    ax.set_xlim(-1500, 1500)
    ax.set_ylim(-50, -10)
    for idx in range(5):
        # layer 1
        ax.plot(
            xcell,
            zeta[idx, 0, 30, :],
            drawstyle="steps-mid",
            linewidth=0.5,
            color=cc[idx],
            label=f"{years[idx]:2d} years",
        )
        # layer 2
        ax.plot(
            xcell,
            zeta[idx, 1, 30, :],
            drawstyle="steps-mid",
            linewidth=0.5,
            color=cc[idx],
            label="_None",
        )
    ax.plot([-1500, 1500], [-30, -30], color="k", linewidth=1.0)
    # legend
    plt.legend(loc="lower left")
    # axes labels and text
    ax.set_xlabel("Horizontal distance, in meters")
    ax.set_ylabel("Elevation, in meters")
    ax.text(
        0.025,
        0.55,
        "Layer 1",
        transform=ax.transAxes,
        va="center",
        ha="left",
        size="7",
    )
    ax.text(
        0.025,
        0.45,
        "Layer 2",
        transform=ax.transAxes,
        va="center",
        ha="left",
        size="7",
    )
    ax.text(
        0.975,
        0.1,
        "Recharge conditions",
        transform=ax.transAxes,
        va="center",
        ha="right",
        size="8",
    )

    # second plot
    ax = fig.add_subplot(2, 2, 2)
    # axes limits
    ax.set_xlim(-1500, 1500)
    ax.set_ylim(-50, -10)
    for idx in range(5, len(years) - 1):
        # layer 1
        ax.plot(
            xcell,
            zeta[idx, 0, 30, :],
            drawstyle="steps-mid",
            linewidth=0.5,
            color=cc[idx - 5],
            label=f"{years[idx]:2d} years",
        )
        # layer 2
        ax.plot(
            xcell,
            zeta[idx, 1, 30, :],
            drawstyle="steps-mid",
            linewidth=0.5,
            color=cc[idx - 5],
            label="_None",
        )
    ax.plot([-1500, 1500], [-30, -30], color="k", linewidth=1.0)
    # legend
    plt.legend(loc="lower left")
    # axes labels and text
    ax.set_xlabel("Horizontal distance, in meters")
    ax.set_ylabel("Elevation, in meters")
    ax.text(
        0.025,
        0.55,
        "Layer 1",
        transform=ax.transAxes,
        va="center",
        ha="left",
        size="7",
    )
    ax.text(
        0.025,
        0.45,
        "Layer 2",
        transform=ax.transAxes,
        va="center",
        ha="left",
        size="7",
    )
    ax.text(
        0.975,
        0.1,
        "Freshwater well withdrawal",
        transform=ax.transAxes,
        va="center",
        ha="right",
        size="8",
    )

    # third plot
    ax = fig.add_subplot(2, 2, 3)
    # axes limits
    ax.set_xlim(-1500, 1500)
    ax.set_ylim(-50, -10)
    for idx in range(5, len(years) - 1):
        # layer 1
        ax.plot(
            xcell,
            zeta2[idx, 0, 30, :],
            drawstyle="steps-mid",
            linewidth=0.5,
            color=cc[idx - 5],
            label=f"{years[idx]:2d} years",
        )
        # layer 2
        ax.plot(
            xcell,
            zeta2[idx, 1, 30, :],
            drawstyle="steps-mid",
            linewidth=0.5,
            color=cc[idx - 5],
            label="_None",
        )
    ax.plot([-1500, 1500], [-30, -30], color="k", linewidth=1.0)
    # legend
    plt.legend(loc="lower left")
    # axes labels and text
    ax.set_xlabel("Horizontal distance, in meters")
    ax.set_ylabel("Elevation, in meters")
    ax.text(
        0.025,
        0.55,
        "Layer 1",
        transform=ax.transAxes,
        va="center",
        ha="left",
        size="7",
    )
    ax.text(
        0.025,
        0.45,
        "Layer 2",
        transform=ax.transAxes,
        va="center",
        ha="left",
        size="7",
    )
    ax.text(
        0.975,
        0.1,
        "Freshwater and saltwater\nwell withdrawals",
        transform=ax.transAxes,
        va="center",
        ha="right",
        size="8",
    )

    # fourth plot
    ax = fig.add_subplot(2, 2, 4)
    # axes limits
    ax.set_xlim(0, 30)
    ax.set_ylim(-50, -10)
    t = zobs["TOTIM"][999:] / 365 - 200.0
    tz2 = zobs["layer1_001"][999:]
    tz3 = zobs2["layer1_001"][999:]
    for i in range(len(t)):
        if zobs["layer2_001"][i + 999] < -30.0 - 0.1:
            tz2[i] = zobs["layer2_001"][i + 999]
        if zobs2["layer2_001"][i + 999] < 20.0 - 0.1:
            tz3[i] = zobs2["layer2_001"][i + 999]
    ax.plot(
        t,
        tz2,
        linestyle="solid",
        color="r",
        linewidth=0.75,
        label="Freshwater well",
    )
    ax.plot(
        t,
        tz3,
        linestyle="dotted",
        color="r",
        linewidth=0.75,
        label="Freshwater and saltwater well",
    )
    ax.plot([0, 30], [-30, -30], "k", linewidth=1.0, label="_None")
    # legend
    leg = plt.legend(loc="lower right", numpoints=1)
    # axes labels and text
    ax.set_xlabel("Time, in years")
    ax.set_ylabel("Elevation, in meters")
    ax.text(
        0.025,
        0.55,
        "Layer 1",
        transform=ax.transAxes,
        va="center",
        ha="left",
        size="7",
    )
    ax.text(
        0.025,
        0.45,
        "Layer 2",
        transform=ax.transAxes,
        va="center",
        ha="left",
        size="7",
    )

    outfig = os.path.join(workspace, f"Figure09_swi2ex4.{fext}")
    fig.savefig(outfig, dpi=300)
    print("created...", outfig)

    return 0


if __name__ == "__main__":
    success = run()